Doorlatch



Nov. 13 1923.

T. J. COO

DOORLATCH Filed Nov. 13. 1920 wm w Patented Nov. 13, 1923.

THOMAS J. COO, OF TOR-ONTO, ONTARIO, CANADA, ASSIGNOB. 'IO VICTORYAUTOIVIOBILE .ACCESSORIES LIMITED, OF TORONTO, CANADA, A CORPORATION OFONTARIO.

DOORLATCH.

Application filed November 13, 1920.

To all 1071017 it may concern. 7

Be it known that I, T roams J. Coo, a S11l)]BCtof the King of GreatBritain, and

resident of the city of Toronto, county of York. Province of Ontario, inthe Dominion of Canada, have invented certain new and usefulImprovements in Doorlatchcs, described in the following specificationand illustrated in the accompanying drawings, that form part of thesame.

The principal objects of the invention are to eliminate the disagreeableconditions due to ill fitting doors preventing them from rattling, andto devise a very simple form of fastening which may be readily appliedto any door.

The principal feature of the invention consists in the novelconstruction and arrangement of a pivotal member in the keepor of thelatch which engages the latch in a wedging contact.

In the drawings, Figure 1 is a perspective view of a port-ion of a frameof an auto1no bile door showing my improved latch fastener securedthereto.

Figure 2 is a transverse sectional view of my improved fastener showingthe edge of the door in a partly closed position and the latch engagingthe fastener.

Figure 3 shows the position of the parts when the latch is fartheradvanced into the keeper.

lfigure 4t shows the latch fully advanced into the keeper and wedgedtightly into place.

Figure 5 .is a perspective detail of a tied form of keeper member.

It is highly desirable that some simple means be provided to overcomethe rattling of loose doors of motor cars and carriages and that adevice he provided which will be adaptable to any form of door. Thedevice herein shown, as adapted to this purpose. consists of a metalbracket 1 of a sub-- stantially wedge shape which forms the keeper.

The bracket ineinber l is shown in Figure l provided. with a pair oflugs 2 through which suitable screws are inserted to fasten the bracketto the door frame. the wedgeshaped portion presenting the bevelledsurface 3 in alignment with the path of movement of the latch portion ofthe door and closing the outward side of the latch recess 4. This sideof the bracket facing inwardly modi- Serial No. 423,840.

toward the recess at is formed with a horizontal slot 5 which cuts intothe bevelled face 3 at the outer edge and in this slot is supported apivotal block 6 mounted upon the pivot pin 7 adjacent to the inward sideof the bracket.

The block 6 is peculiarly shaped having a curved spur 8 arranged on theside adjacentto the outer side of the bracket. EX- tending from the spuris a bevelled surface 9, the bevel of which evtends away from the pivotof the block and merges into another beveled surface 10 which also isbevelled away from the axis of rotation of the block and is sloped sothat if its inclination were projected back to the spur the inclinationwould cut the spur back of its point.

The reason for this peculiar arrangement of surfaces in relation to theaxis of rotation of the pivotal member of the spur is that which causesthe device to be effective.

A latch bolt 11 which is carried in the door 12 is of the ordinaryspring variety having a curved inward face and flat outward face 13.

tefcrring to Figure 2 it will be seen that the door just being closedand that the latch bolt has passed over the apex of the bevelled surface3 of the bracket 1 and has sprung inwardly. The pivotal block 6 is heldto the position shown in Figure 2 by means of a flat spring 14-,arranged in a recess 15 at the inward side of the block close to theframe and the latch bolt passes the spur 8 and engages the bevelledsurface 9 and as the door is moved farther in the pressure of the latchspring which is considerably greater than the spring 14L pushing againstthe bevelled surface 9 oscillates the block 6 on its pivot asillustrated iirl igure 3. the spur 8 bearing against the face 13 of thelatch. This movement continues until the point of the latch bolt slipsover the angle of juncture between the t'accs and Ill).

The latch bolt bearing the point of the spur engages the bevelled. face10 at a very acute angle and a locking efl'ect is prorjluced which holdsthe latch in place and this bevelled surface takes up any looseness inthe fit of the door allowing the latch bolt to come to rest at anydesirable point which forms its limit but securely locking the bolt inany position which it assumes and wedging the door tightly into place.

Jill) It will be seen that the vibration of travel, when the device isused on a motor car will cause the door to shake and the effect will beto. allow the latch to wedge the door tightly against the bevelledsurface 10. The spur 8 holds the latch in a proper relative position tothe surface 10 but allows the latch. to engage the sharper bevel 9 whenit is first entering. V

A device such as described will hold any door tight and prevent itrattling as is readily a iparent. It is extremely simple in constructionand may be easily and quickly attached to any door frame withoutinterfer ing with the door lock in any manner or requiring any machinework. The extremely simple construction enables the device to bemanufactured at very low cost. a

In the modified construction shown in Figure 5 the keeper block 16 ispivoted between the fastening lugs 1'7 but other-wise is formed the sameas the bracket 1 and car ries the locking block 6 the same as the otherstructure. The feature about this modification is that being pivotallysupported it can swing oijltwardly from the door frame to. allow of agreater range of adjustment in the event of a. bad fitting door.

The latch has been described as applied particularly to doors of motorcars but it may be utilized in connection with windows andother deviceswhere it is desired to hold a movable member from rattling.

What I claim as my invention is 1. In a door latch, the combination withthe latch bolt and keeper, of a member ,pivotally supported in thekeeper formed with a l 'tastened to the door frame and having a l)eveled surface to engage the latch and a. horizontal slot in its inwardface, a block pivotally mounted in said slot having a spur projectionatone side, and a pair'of bevelled faces arranged in obtuse angularrelation the one to the other to diverge from the axis of rotation ofthe block andiadapted to wedge a ga-i'nst outward face of the latch.

3. In a door latch, the combination with a latch bolt. of a triangularshaped. block having fastening lugs adapted to secure the block tothedoor frame, said block having a transverse slot/in its inward face, apivot pin extending vertically across said transverse slot arrangedtoward the inward sideof the slot, a block pivotall'y' mounted on saidpin and having a curved outward side terminating in a spur, the side,adjacent to the spur extending therefrom at: an angle which divergesfrom the pivot point of th'elolock said blockhaving a second angularface merging into the first one at an acute angular inclinationinrelation to the point'of'tlie spur and the point of the block;

THOMAS J1 000.

